杂交水稻恢复系绵恢501的选育及应用

用明恢63／／泰引一号／IR26杂交选育的杂交水稻恢复系绵恢501，具有恢复度高、配合力强、抗病性好、制种产量高、杂种优势强等特点，与野败型、冈型、D型、印泥水田谷型等不育系配组，均表现出较强的杂种优势和优良的综合性状，其中Ⅱ优501、二汕优501、D优501和冈优501已先后通过四川省品种审定委员会审定，并在南方稻区大面积示范推广。

BREEDING OF RICE RESTORER MIANHUI 501 AND ITS SYSTEMATICAL COMBINATIONS UTILIZATION

Mianhui 501, an indua restorer in rice, was developed from cross of Minghui 63 // Taiyin 1/IR26,It has strong restoring ability,good combining abili-ty,good disease resistance and high yield of hybrid seed production. It was crossed to all kinds of CMS lines such as WA type's,Gang type,s,D type,s and IP type's.They showed strong combination and best all-round traits. Its combinations such as Eryou 501,Ershan You 501, D you 501 and Gang You 501 were examined and approved for release in Sichuan Province in 1993 ~ 1996. At the same time theywere being demonstrated and planted in the south Rice Region.